I am taking my newly minted Jr. OW certified 11 year old grandson on a dive cruise to Coz, Roatan, and Belize and could use some advice. Although I am hiring a private DM for all the ports and know we are limited to 40' depth, i have not had the opportunity to watch his training or dive with him. I have had in-depth discussions with his instructor about his training, and was told he did great, better than the adults in his class. Although we have a private DM, my grandson's safety is my responsibility, and I am not relying on the DM to be his dive buddy. I am thinking of tethering my grandson to me, at least for the first couple of dives until I am satisfied with his buoyancy control and novice skills. Any other suggestions would be appreciated. Thank you in advance.